---
header: Domain Inspector
lang: en
last_updated: '2026-02-23'
url: https://docs.fastly.com/products/domain-inspector
---

[Domain Inspector](https://www.fastly.com/documentation/guides/observability/observability-dashboards/about-the-domains-page/) provides you with a dataset and visualizations that offer real-time visibility and historical reporting of domain-level metrics delivered by a Fastly service. It allows you to monitor traffic for a [fully qualified domain name](https://en.wikipedia.org/wiki/Fully_qualified_domain_name) without requiring you to send log data to a [third-party data collector](https://www.fastly.com/documentation/guides/integrations/logging-endpoints).

Specifically, Domain Inspector aggregates response data (for example, requests, bandwidth, edge or origin response codes, and cache hit ratios) received by a specified service and presents that information for each domain either as visualizations in the control panel or as a JSON formatted data stream.

> **IMPORTANT:** This product is not available for Next-Gen WAF.

## Limitations and considerations

This product has the following limitations and considerations:

- We limit you to 250 domains per service with Domain Inspector. Reach out to [support@fastly.com](mailto:support@fastly.com) for details on how to increase this limit.
- The data retention period for this product is 45 days if you purchased a [package offering](https://www.fastly.com/package-entitlements/).
- To help control data collection and aggregation, [wildcard domains](https://en.wikipedia.org/wiki/Wildcard_DNS_record) are aggregated against a single `*.example.com` entry.
- Domain Inspector is not supported on services that use [IP-to-service pinning](https://docs.fastly.com/products/dedicated-ip-addresses#ip-to-service-pinning).
- Domain Inspector does not support domains that are longer than 64 characters.
- Data related to edge hit ratio and origin offload are not available for Compute services.

## Billing

Fees for Domain Inspector are charged based on the number of unique domains sending traffic through Fastly.

> **NOTE:** For more details about this product, including [pricing information](https://www.fastly.com/pricing) and help with purchasing it, contact your account manager or email [sales@fastly.com](mailto:sales@fastly.com).